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THADDEUSC. BANKS,'OF WALLING'FORD, CONNECTICUT.

Letters .Patent No. 75,833, dated March 24, l1868.

IMPROVEMENT IN BOILERALARIVI GAUGES.

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TO .ALL WHOM IT MAY GONCERN:

Be it known that I, THADDEUS C. BANKS, of Wallingford, in the county of New Haven, and State of Connecticut, have invented and made a certain new and useful Improvementvin Boiler-Alarm Gauges; and I do hereby declare the following to `be a full, clear, and exact description of the -said invention, reference being had to the annexed drawing, making part of this speciiieation, wherein- Figure 1 is an elevation of said gauge as applied to a boiler.

Figure 2 is a vertical section; and

Figure 3 is a horizontal section of the cock employed to free the Siphon-pipe from sediment.

Similar marks of reference denote the same parts.A

A boiler-indicator has heretofore been made 'with a horizontal tube, B, attached firmly, at b, to the boiler, and connected at one end by a. pipe,l cl, to `the boiler above the water-line, and by a pipe from e to the boiler below the water-line, so that whenV the water in the boiler sunk below the tube B, the steam passing into the same should expand the tube B, and act upon the rods z' and cross-head le, to buckle up a spring, C, between the cross-head k and a fixed head, c, and operate on a rod to a whistloor other alarm, m. In this alarm it became necessary that the pipes, n'ear their points oi' attachment to the boilers, should be provided with cocks,

so asito shutoff' the same in case of injury to the glass gauge, and also to allow for blowing through and cleaning out thc pipes. This involved considerable expense, and a risk that the attendant might leave the cocks, orsome of them, closed, and thereby the apparatus become useless.

The nature of my said'invention consists in combining, with the expansion-tube and alarm aforesaid, an invertedsiphompipe and a three-way cock, that can be used for blowing out sediment from either side ofthe apparatus; and it is so constructed thatthe blowing ott will continue until the circulation is opened, so that either the apparatus is in full working condition or the-sediment is being blown ofi'. Thereby there is only one cock to be regulated, and no possibility of the apparatus being left in an inoperative condition.

Ihe cock n is made with a side-discharge, 2, so that when the plug is turned into the position shown in fig.

E3, the sediment can be blown out ofthe pipes B and e, through the discharge at 2, into any suitable waste-pipe.

When the plug is rotated half a turnLthe pipe'e will he closed,`an`d sediment he blown out from the leg e of the Siphon. vAt any intermediate point the blowing oil' will continue uutil the main channel of the plug opens the communication between the two pipes e and e', tobring the apparatus fully into operative condition.

What I claim, and desire tolsecure by LettersPatent, is

The inverted Siphon and three-way cock, in combination with the expansion-tube B and an alarm, substantiallyasgand for the purposes' sety forth.

In witness whereof, I have hereunto set inysignature, this fth day of November, A. D. 1867.

A T. e. BANKS.

Witnesses:

Guss. H. SMITH,

Gao. D. WALKER. 

